Automatic playing system

Abstract

An automatic playing system may include a damper module for changing a sound generated by the automatic playing system. The damper module may include a damper board, a motion driver, and a supporter. The damper board may be configured to control at least one damper of the automatic playing system. The motion driver may be configured to drive the damper board and operated to perform at least one automatic playing function. The supporter may be configured to couple the damper board with the motion driver when the motion driver is operated.

What is claimed is: 
     
       1. An automatic playing system comprising:
 a damper module for changing a sound generated by the automatic playing system, the damper module comprising:
 a damper board configured to control at least one damper of the automatic playing system; 
 a motion driver configured to drive the damper board, wherein:
 the motion driver comprises a solenoid and an iron core, 
 from top to bottom, the iron core includes: a first portion, a second portion, and a third portion, and 
 a diameter of the second portion is larger than at least one of a diameter of the first portion or a diameter of the third portion; and 
 
 a supporter configured to couple the damper board with the motion driver when the motion driver is operated, wherein the motion driver is operated to perform at least one automatic playing function. 
 
 
     
     
       2. The system of  claim 1 , wherein the at least one damper is configured to control movements of at least one string of the automatic playing system. 
     
     
       3. The system of  claim 1 , when the motion driver is operated to perform the automatic playing function, the iron core moves upward and the damper board is raised up by the iron core through the supporter. 
     
     
       4. The system of  claim 3 , when the damper board is raised up, the damper board causes the at least one damper to move away from at least one string of the automatic playing system. 
     
     
       5. The system of  claim 1 , wherein the first portion of the iron core is in contact with the supporter when the motion driver is operated. 
     
     
       6. The system of  claim 1 , wherein the first portion of the iron core is spaced apart from the supporter when the motion driver is not operated. 
     
     
       7. The system of  claim 1 , wherein the solenoid further comprises:
 a coil configured to generate a magnetic field when the motion driver is operated; and 
 a cavity installed beneath the coil. 
 
     
     
       8. The system of  claim 7 , wherein the second portion of the iron core is encircled by the coil of the solenoid. 
     
     
       9. The system of  claim 7 , wherein the cavity of the solenoid comprises a hole configured to guide the third portion of the iron core to pass through the cavity of the solenoid. 
     
     
       10. The system of  claim 9 , wherein the damper module comprises a bushing installed in the hole of the cavity. 
     
     
       11. The system of  claim 10 , wherein the bushing is made of polyformaldehyde. 
     
     
       12. The system of  claim 7 , wherein the damper module comprises a first silencer installed on a bottom of the cavity. 
     
     
       13. The system of  claim 12 , wherein the second portion of the iron core comprises a rim near a junction of the second portion and the third portion of the iron core. 
     
     
       14. The system of  claim 13 , wherein the damper module comprises a second silencer installed on the rim of the second portion of the iron core. 
     
     
       15. The system of  claim 12 , wherein the first silencer is made of woolen felt. 
     
     
       16. The system of  claim 1 , wherein the damper module comprises an elastic sleeve installed on a part of the supporter. 
     
     
       17. The system of  claim 16 , wherein the elastic sleeve is made of rubber. 
     
     
       18. The system of  claim 1 , wherein the automatic playing system further comprises a keybed configured to be fixed with the motion driver.